
HI there,
Most vets may know of breeders coming in and out of the surgery but they will not really or can't assure of the breeders quality.
Best to contact the breed club in your area. They are generally happy to help.
There is also a couple of bigger shows coming up, such as National terrier an Crufts, you could go alone and at the end of showing speak to some of the exhibitors.
Pam